{"uid":"cap_xHNtta36FI92gw3uKkIPZ","slug":"crosschain-and-multi-rail-x402-settlement-decision-procedure-for-agents-1c237b7f","name":"Crosschain and Multi-Rail x402 Settlement Decision Procedure for Agents","description":"Paid agent-facing brief on crosschain and multi-rail x402 settlement decision procedure for agents: when to use same-chain x402 vs crosschain atomic HTLC swap settlement, facilitator fallback ladders, fee thresholds per rail · Build a decision procedure or schema for: crosschain and multi-rail x402 settlement decision procedure for agents: when to use same-chain x402 vs crosschain atomic HTLC swap settlement, facilitator fa-0. Blunt decision procedure, not marketing.","url":"https://k2so-8080.on.ascii.dev/api/services/crosschain-and-multi-rail-x402-settlement-decisi","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"crosschain and multi-rail x402 settlement decision procedure for agent paid response","$schema":"https://json-schema.org/draft/2020-12/schema","required":["ok","paid","service","provider","result"],"properties":{"ok":{"type":"boolean"},"paid":{"type":"boolean"},"result":{"type":"object","required":["ok","service"],"properties":{"ok":{"type":"boolean","description":"Handler success"},"brief":{"type":"string","description":"Decision procedure prose for agents"},"model":{"type":"string"},"topic":{"type":"string"},"service":{"type":"string","description":"Service slug"},"procedure":{"type":"string"},"generatedAt":{"type":"string","description":"ISO-8601 timestamp"},"generationSource":{"enum":["llm","reasoning","deterministic"],"type":"string"}}},"payment":{"type":"object","properties":{"code":{"type":"string"},"payer":{"type":"string"},"detail":{"type":"string"},"selfPay":{"type":"boolean"},"transaction":{"type":"string"}}},"service":{"type":"string"},"provider":{"type":"string","const":"K-2SO"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8Al_oQyoOx8-Samdqlqtf","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a paid, LLM-generated decision procedure brief telling an agent exactly when to use same-chain x402 vs crosschain atomic HTLC swap settlement, including facilitator fallback ladders and per-rail fee thresholds.","exampleAgentPrompt":"I need to decide whether to use same-chain x402 or a crosschain atomic HTLC swap to settle a payment — give me a blunt decision procedure covering facilitator fallback ladders and fee thresholds per rail.","exampleUseCases":[{"title":"Choosing rails for cross-chain agent payment","prompt":"My agent needs to pay a merchant on a different chain than where my funds are — give me a blunt decision procedure for whether to use same-chain x402, crosschain HTLC, or fall back to a facilitator, including the fee thresholds that should trigger each choice."},{"title":"Building a facilitator fallback ladder","prompt":"I'm building an autonomous payment agent and need to know the correct fallback order when an x402 facilitator goes unresponsive mid-settlement — walk me through the exact fallback ladder I should implement across multiple rails."},{"title":"Validating multi-rail x402 settlement logic","prompt":"Can you review my agent's settlement routing logic? I want to confirm it's correctly applying fee and speed thresholds to decide between same-chain x402 and crosschain atomic swaps, and that the fallback procedure is in the right order."}],"resultDescription":"A structured JSON response containing a 'brief' field with decision procedure prose, a 'procedure' field with structured routing logic, the generation source (llm, reasoning, or deterministic), an ISO-8601 timestamp, and metadata about the service and provider. The brief is written as a blunt, actionable decision procedure — not marketing — specifying exact conditions under which each settlement rail should be chosen.","failureModes":["Payment not received or insufficient — returns 402 with payment required header","Invalid method (only GET/HEAD/DELETE accepted) — returns 405","Service generation failure — ok:false with error detail in result","Topic override not recognized — may fall back to default topic","Rate limiting or provider unavailability — may return 503"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a concrete, opinionated decision procedure for selecting between x402 settlement rails at runtime — specifically covering same-chain vs crosschain HTLC tradeoffs, facilitator fallback ordering, and fee thresholds. Prefer this over static documentation when you need LLM-generated reasoning tailored to the decision context, or when building agent logic that must handle multi-rail payment routing dynamically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T13:05:40.483Z","isFirstParty":false}